The actual blower unit used in the NB kits is capable of 300whp so you're getting a bit more than just the base kit hp for your money. The other reality that can't be stressed enough is that these kits are plug and play track ready. No bolts falling off, no oil lines leaking, no stuff melting, nothing. The test mules have had dozens of track days and tens of thousands of Los Angeles commuting miles on them without a single issue. Zero driveability issues. No idle droop. No stalling. No mysterious hiccups. No starting issues. Nothing. For those of you that have used other F/I kits and enjoyed the many little issues most of them have, you probably understand why I point all that out. For those of you that have never owned a Miata with an aftermarket F/I kit, the simplicity, reliability and durability of the Rotrex kit are qualities that should be valued right alongside the power output. Like the site says, all boost is not created equal.
I was doubting about these kits when I first saw the high price/low output and almost no info on this kit a while back, but now reading of the capability, I'm leaning to getting this instead of a MP62 later this year.